PartsTable
Technical Data Sheet
Download PDF

42537A — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

42537A: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: ALUMINUM ALLOY, design_type: SOLID, end_diameter: 0.3020 INCHES MINIMUM AND 0.3220 INCHES MAXIMUM IN, overall_height: 0.2400 INCHES MINIMUM AND 0.2600 INCHES MAXIMUM IN, special_features: HOLE IN BASE 0.156 IN. DEEP,0.156 IN.

DIA IN, style_designator: SEAT. This part is cataloged in the U.S. Government catalog under NSN 5340-01-060-1000, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
42537A
NSN: 5340-01-060-1000
FSC: 5340 — Hardware, Commercial
CAGE: 73760 — ITT AEROSPACE CONTROLS LLC DBA ITT AEROSPACE CONTROLS UNIT S (USA)
SPECIFICATIONS
materialALUMINUM ALLOY
design_typeSOLID
end_diameter0.3020 INCHES MINIMUM AND 0.3220 INCHES MAXIMUM IN
overall_height0.2400 INCHES MINIMUM AND 0.2600 INCHES MAXIMUM IN
special_featuresHOLE IN BASE 0.156 IN. DEEP,0.156 IN. DIA IN
style_designatorSEAT
first_step_length0.0830 INCHES MINIMUM AND 0.1030 INCHES MAXIMUM IN
surface_treatmentANODIZE
first_step_diameter0.5650 INCHES MINIMUM AND 0.5700 INCHES MAXIMUM IN
second_step_diameter0.7300 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN
distance_from_end_to_first_step0.0340 INCHES MINIMUM AND 0.0940 INCHES MAXIMUM IN
surface_treatment_document_and_classificationMIL-A-8625, TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE
NSN5340-01-060-1000
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 42537A MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FIRST STEP DIAMETER: 0.5650 INCHES MINIMUM AND 0.5700 INCHES MAXIMUM IN
•
END DIAMETER: 0.3020 INCHES MINIMUM AND 0.3220 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625, TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE
•
DISTANCE FROM END TO FIRST STEP: 0.0340 INCHES MINIMUM AND 0.0940 INCHES MAXIMUM IN
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
•
SECOND STEP DIAMETER: 0.7300 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.2400 INCHES MINIMUM AND 0.2600 INCHES MAXIMUM IN
FIRST STEP DIAMETER0.5650 INCHES MINIMUM AND 0.5700 INCHES MAXIMUM IN
END DIAMETER0.3020 INCHES MINIMUM AND 0.3220 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625, TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE
DISTANCE FROM END TO FIRST STEP0.0340 INCHES MINIMUM AND 0.0940 INCHES MAXIMUM IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
SECOND STEP DIAMETER0.7300 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN
FIRST STEP LENGTH0.0830 INCHES MINIMUM AND 0.1030 INCHES MAXIMUM IN
SPECIAL FEATURESHOLE IN BASE 0.156 IN. DEEP,0.156 IN. DIA IN
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
Ready to buy 42537A?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 42537A?
42537A is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for 42537A?
42537A is cataloged in the U.S. Government catalog under NSN 5340-01-060-1000. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 42537A

✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.