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Home / Preparation & Hardware / Retaining Spring for 1/4 Turn Fasteners

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Why Competition Supplies?

These retaining springs are for use with our 5/16" quarter turn fasteners. They are available in a range of clearances which when combined with the various stud lengths we offer allows a wide range of combined panel thicknesses to be effectively retained.

The required stud length is calculated by addind the total material thickness being clamped to the spring clearance and then subtracting the spring deflection required to create the clamping force.
The recommended spring deflection range for our 1" long springs is 0.023" - 0.058".
The table below shows the total material thickness that can effectively be retained with the various stud length and spring height combinations that we offer.

Stud Part No.	Length "L"*		Spring Height	Spring Part No.	Total Material Thickness
Stud Part No.	Inches	mm	Spring Height	Spring Part No.	Inches	mm
E5400	.400"	10.2	0.300"	S5300	.123" - .158"	3.1 - 4.0
E5400	.400"	10.2	0.275"	S5275	.148" - .183"	3.8 - 4.6
E5400	.400"	10.2	0.250"	S5250	.173" - .208"	4.4 - 5.3
E5450	.450"	11.4	0.300"	S5300	.173" - .208"	4.4 - 5.3
E5450	.450"	11.4	0.275"	S5250	.198" - .233"	5.0 - 5.9
E5450	.450"	11.4	0.250"	S5225	.223" - .258"	5.7 - 6.6
E5500	.500"	12.7	0.300"	S5300	.223 - .258"	5.7 - 6.6
E5500	.500"	12.7	0.275"	S5250	.248" - .283"	6.3 - 7.2
E5500	.500"	12.7	0.250"	S5225	.273" - .308"	6.9 - 7.8
E5550	.550"	14.0	0.300"	S5300	.273" - .308"	6.9 - 7.8
E5550	.550"	14.0	0.275"	S5250	.298" - .333"	7.6 - 8.5
E5550	.550"	14.0	0.250"	S5225	.323" - .358"	8.2 - 9.1
E5600	.600"	15.2	0.300"	S5300	.323" - .358"	8.2 - 9.1
E5600	.600"	15.2	0.275"	S5250	.348" - .383"	8.8 - 9.7
E5600	.600"	15.2	0.250"	s5225	.373" - .408"	9.5 - 10.4
E5650	.650"	16.5	0.300"	S5300	.373" - .408"	9.5 - 10.4
E5650	.650"	16.5	0.275"	S5250	.398" - .433"	10.1 - 11.0
E5650	.650"	16.5	0.250"	S5225	.423" - .458"	10.7 - 11.6
E5700	.700"	17.8	0.300"	S5300	.423 - .458"	10.7 - 11.6
E5700	.700"	17.8	0.275"	S5250	.448" - .483"	11.4 - 12.3
E5700	.700"	17.8	0.250"	S5225	.473" - .508"	12.0 - 12.9
E5750	.750"	19.1	0.300"	S5300	.473" - .508"	12.0 - 12.9
E5750	.750"	19.1	0.275"	S5250	.498" - .533"	12.6 - 13.5
E5750	.750"	19.1	0.250"	S5225	.523" - .558"	13.3 - 14.2
E5800	.800"	20.3	0.300"	S5300	.523" - .558"	13.3 - 14.2
E5800	.800"	20.3	0.275"	S5250	.548" - .583"	13.9 - 14.8
E5800	.800"	20.3	0.250"	s5225	.573" - .608"	14.6 - 15.4

*Please Note: The overall length of the stuf is approximately 0.125" (3.17mm) longer than the "L" dimension listed here.

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We stock an extensive range of components carefully curated to offer quality and value for money. We have not joined the mad rush for the bottom and recognise that value isn't only about price. We invest heavily in stock to offer exceptional availability and understand our products so we can work with you to create installations that are elegant and effective whilst meeting your performance and budgetary requirements. Large stocks and carefully selected courier partners allow us to offer unrivalled fast delivery when the pressure is on and great value when you have a little more time. If service, performance and value are your motivation then Competition Supplies are your best choice.

Part numbers:
S5250 S5-225 S5275 S5300

Retaining Spring for 1/4 Turn Fasteners

0.300" Clearance

Part number: S5300

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Copyright © Sat May 17 05:36:16 BST 2025 Competition Supplies | Unit 17, Silverstone Technology Park, Silverstone Circuit, Towcester, Northamptonshire, NN12 8TL | Company No. 6780904 | VAT No. GB943686975

Unit 17, Silverstone Technology Park, Silverstone Circuit, Towcester, Northamptonshire, NN12 8TL | Company No. 6780904 | VAT No. GB943686975