Plastic Screw Characteristics

Plastic Screw Abbreviations, Names, and Maximum Temperatures

Abbreviation	Name	Maximum Temperature
VESPEL®	SP-1	288ºC(Usable Temperature)
VESPEL®	SCP-5000	350ºC(Usable Temperature)
PEEK^*	Polyetheretherketone	180ºC (UL Approved Temperature)
PFA	Perfluoroalkoxy	260ºC(UL Approved Temperature)
PTFE	Tetrafluoroethylene	180ºC (UL Approved Temperature)
AURUM^*	Aurum	240ºC (UL Approved Temperature)
PPS	Polyphenylene Sulfide	200ºC (UL Approved Temperature)
H-PVC	Hard Polyvinyl Chloride	-10ºC~35ºC (Temperature Range)
RENY^*	50% Glass Fiber Reinforced Polyamide MXD6	105ºC (UL Approved Temperature)
PC	Polycarbonate	115ºC (UL Approved Temperature)
PP	Polypropylene	65ºC (UL Approved Temperature)
PVDF	Polyvinylidene Fluoride	-40ºC~90ºC (Temperature Range)

•The values listed above are for reference only; the temperature ranges will vary according to tightening torque.
*Dupont™and VESPEL® is a registered trademark of E. I. du Pont de Nemours and Company.
*PEEK is a registered trademark of Vitre^TM.
AURUM is a registered trademark of Mitsui Chemicals, Inc.
RENY is a registered trademark of Mitsubishi Engineering-Plastics Corporation.

Plastic Screw Selection Index

Strength	RENY> PPS> VESPEL®(SCP-5000)> PEEK> AURUM> VESPEL®(SP-1)> PC> PVDF> PP> H-PVC> PFA> PTFE	See chart for Tensile Breaking Force
Heat Resistivity	VESPEL®(SCP-5000)> VESPEL®(SP-1)>PTFE・PFA> AURUM> PPS> PEEK> PC> RENY> PVDF> PP> H-PVC	See chart above
Chemical Resistivity	PTFE> PFA> PVDF> H-PVC・PP> PEEK・AURUM> PPS> PC> VESPEL®(SCP-5000)> VESPEL®(SP-1)>RENY	See chart for Chemical Resistivity

Plastic Screws comply with JIS and ISO standards, however due to differences in manufacturing processes specifications may vary slightly from that of metal screws.
Mechanical property values in the charts are for reference only. Values may vary in performance conditions.
Use the Torque Driver or Torque Wrench to tighten screws.
Chemical Resistance values will vary according to usage conditions. Plastic Screws should be tested under actual performance conditions prior to use.
Colors of small screws, bolts, nuts, and washers may vary slightly by production lot.
PEEK and AURUM Screws fall into list of designated-items known as dual use materials. When exporting these products, observe "Catch-All Controls" and other relative foreign trade laws and regulations.

Properties

	Test Method (ASTM)	Unit	VESPEL® SP-1	VESPEL® SCP-5000	PEEK	PFA	PTFE	AURUM	PPS	RENY	PC	PP	PVDF
Tensile Strength	D638	MPa	86	160	91	28	27~35	92	196	285	62	36	57
Tensile Elongation	D638	%	7.5	7	50~120	88	250~400	90	2.2	2.1	110	500	70~80
Flexural Strength	D790	MPa	110	247	147	-	-	137	255	380	88.2	-	75
Flexural Modulus	D790	GPa	3.1	5.7	3.9	0.48	0.55	2.9	13.2	17.4	2.3	1.5	1.99
Izot Impact, Notched	D256	J/m	42.7	-	88	Not Broken	160	88	98	110	880	30	160～375
Rockwell Hardness	D785	R/M Scale	M90	M100	R126	-	-	R129	M100	M111	R120	R100	R93～116
Deflection Temp under load (1.82MPa)	D648	ºC	360	350	152	-	55	238	270	234	135	120	80
Flame Class	UL94	-	V-0	V-0	V-0	V-0	V-0	V-0	V-0	HB	V-2	HB	V-0
Dielectric Constant (10⁶Hz)	D150	-	3.6	3.3	3.3	<2.1	<2.1	3.1	4.6	4.0	2.9	-	10
Dielectric Loss Tangent (10⁶Hz)	D150	-	0.0034	0.001	0.004	0.0003	<0.0002	0.0034	0.002	0.009	0.009	-	0.015
Volume Resistivity (×10¹⁶)	D257	Ω·cm	0.01~0.1	0.1	4.9	>100	>100	10³~10⁴	1.0	1.3	4.0	1.0	0.1~1
Dielectric Breakdown Strength	D149	MV/mm	22	-	17	20	6~10	-	12	32	16	31	300
Arc Resistance	D495	sec	-	-	23	>300	>300	81	120	129	120	-	-
Specific Gravity	D792	-	1.43	1.43	1.30	2.15	2.14~2.2	1.33	1.66	1.65	1.20	0.91	1.79
Water Absorption (Dip 24hx20ºC)	D570	%	0.240	0.080	0.500	0.010	<0.010	0.34	0.015	0.140	0.150	0.010	0.030
Glass Fiber Content	-	%	-	-	-	-	-	-	40	50	-	-	-

•The numerical values listed above are for reference only; they are not guaranteed under performance conditions.

Properties

	Test Method (JIS)	Unit	H-PVC
Tensile Strength	JIS K 6723　　　　　　　　　　Test Rate: 200mm/min	MPa	26
Tensile Elongation	JIS K 6723　　　　　　　　　　Test Rate: 200mm/min	%	200
Hardness	JIS K 6253 10sec.　　　　　(2mm thick, 3 pieces)	Hs	98
100% Modulus	JIS K 6723　　　　　　　　　　Test Rate: 200mm/min	MPa	20
Low Temp. Resistance	JIS K 6723	ºC	10
Specific Gravity	JIS K 7112　　　　　　　　　　A-Method	-	1.32

•The numerical values listed above are for reference only; they are not guaranteed under performance conditions.

Chemical Resistance

Chemical Names	VESPEL® SP-1	VESPEL® SCP-5000	PEEK	PFA	PTFE	AURUM	PPS	H-PVC	RENY	PC	PP	PVDF
10% Hydrochloric Acid	A	A	A	A	A	A	A	A	C	A	A	A
10% Sulfuric Acid	A	A	A	A	A	A	A	A	C	A	A	A
50% Sulfuric Acid	C	B	C	A	A	C	-	A	C	B	-	A
10% Nitric Acid	B	△	A	A	A	A	A	A	C	A	A	A
50% Nitric Acid	C	C	C	A	A	C	-	B	C	B	-	B
10% Hydrofluoric Acid	B	B	-	A	A	A	-	B	C	A	A	A
50% Hydrofluoric Acid	C	C	C	A	A	C	-	B	C	B	B	A
10%Phosphoric Acid	-	-	A	A	A	A	-	A	C	A	A	A
Formic Acid	B	B	B	A	A	-	-	B	C	A	A	A
10% Acetic Acid	A	A	A	A	A	A	A	A	C	A	A	A
Citric Acid	A	A	A	A	-	A	-	A	B	A	A	A
Chromic Acid	-	-	A	A	A	-	-	A	C	A	A	A
Boric Acid	A	A	A	B	A	-	-	A	B	A	A	A
Methyl Alcohol	B	B	A	A	A	A	A	A	-	B	-	A
Glycol	A	A	A	A	-	A	-	-	-	A	-	A
Ammonia	C	B	A	A	-	A	-	A	A	C	A	A
10% Sodium Hydroxide	C	B	A	A	A	A	A	A	A	-	A	A
10% Potassium Hydroxide	C	B	A	A	A	A	-	A	A	C	A	A
Calcium Hydroxide	-	-	A	A	-	A	-	A	C	A	A	A
Water	A	A	A	A	A	A	A	A	B	A	A	A
Hydrogen Sulfide(Gas)	-	-	A	A	-	-	-	-	A	A	A	A
Sulfur Dioxide	-	-	A	A	-	-	-	-	A	A	A	A
Ammonium Nitrate	-	-	A	A	-	A	-	-	A	A	A	A
Sodium Nitrate	-	-	A	A	-	A	-	-	A	C	A	A
Calcium Carbonate	-	-	A	A	-	A	-	-	A	C	A	A
Calcium Chloride	-	-	A	A	A	A	A	A	A	A	A	A
Magnesium Chloride	-	-	A	A	A	A	-	A	A	A	A	A
Magnesium Sulfate	-	-	A	A	-	A	-	-	A	A	A	A
Zinc Sulfate	-	-	A	A	-	A	-	-	A	A	A	A
Hydrogen Peroxide	B	B	A	A	A	-	-	A	B	A	A	A

A: Usable
B: Usable under certain conditions
C: Non-usable
• Data from samples tested at room temperature (23ºC). Chemical Resistance values will vary according to usage conditions, Plastic Screws should be tested under actual performance conditions prior to use.

Plastic Screw Tensile Breaking Force (N)

	VESPEL® SP-1	VESPEL® SCP-5000	PEEK	PFA	PTFE	AURUM	PPS	H-PVC	RENY	PC	PP	PVDF
M1.7	-	-	59	-	-	-	-	-	80	47	-	-
M2	-	-	160	-	-	-	236	-	303	112	-	-
M2.6	-	-	312	-	-	-	440	-	588	227	-	-
M3	0.12	0.21	430	-	45	420	570	-	635	300	-	-
M4	0.27	0.47	765	0.04	79	740	980	140	1470	515	270	-
M5	0.54	0.98	1230	0.21	128	1170	1570	270	2450	750	440	640
M6	0.95	1.65	1670	0.35	181	1680	2250	455	3140	1080	620	940
M8	2.26	4.04	3090	0.85	329	3330	3720	-	5100	1470	1100	1810
M10	-	-	4900	-	522	-	5890	-	6900	3140	1800	2700
M12	-	-	7360	-	759	-	7850	-	8700	4710	2400	-
M16	-	-	-	-	-	-	-	-	18000	-	-	-

•The numerical values listed above are for reference only; they are not guaranteed under performance conditions.

Plastic Screw Torsional Breaking Torque (N·m)

	PEEK	PPS	AURUM	RENY	PC	PP	PVDF
M1.7	0.02	-	-	0.03	0.02	-	-
M2	0.06	0.08	-	0.1	0.05	-	-
M2.6	0.16	0.19	-	0.24	0.12	-	-
M3	0.3	0.36	0.25	0.39	0.22	-	-
M4	0.64	0.71	0.52	0.79	0.54	0.23	-
M5	1.28	1.42	1.26	1.77	1.03	0.51	0.64
M6	2.26	2.11	1.89	2.94	1.37	0.8	0.88
M8	5.98	5.29	5	7.85	2.94	2.2	2.65
M10	10.8	11.8	-	12.75	5.9	3.4	3.9
M12	18.6	20.6	-	24.5	10.3	5.3	-
M16	-	-	-	39	-	-	-

•The numerical values listed above are for reference only; they are not guaranteed under performance conditions. The recommended torque is 50% of the numerical values listed above.