PartsTable
Technical Data Sheet
Download PDF

71997-7 — RETAINER,HELICAL COMPRESSION SPR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

71997-7: RETAINER,HELICAL COMPRESSION SPR.

RETAINER,HELICAL COMPRESSION SPR. Key specifications include material: COPPER ALLOY, overall_height: 0.750 INCHES NOMINAL IN, flange_diameter: 2.375 INCHES NOMINAL IN, flange_thickness: 0.250 INCHES NOMINAL IN, special_features: SEMICIRCULAR HOLE IN FLANGE END 0.313 IN. RADIUS IN, style_designator: IRREGULAR.

This part is cataloged in the U.S. Government catalog under NSN 5340-01-302-5069, 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
71997-7
NSN: 5340-01-302-5069
FSC: 5340 — Hardware, Commercial
CAGE: 75545 — LAWLER MANUFACTURING COMPANY, INC. (USA)
SPECIFICATIONS
materialCOPPER ALLOY
overall_height0.750 INCHES NOMINAL IN
flange_diameter2.375 INCHES NOMINAL IN
flange_thickness0.250 INCHES NOMINAL IN
special_featuresSEMICIRCULAR HOLE IN FLANGE END 0.313 IN. RADIUS IN
style_designatorIRREGULAR
body_inside_diameter0.625 INCHES NOMINAL IN
body_outside_diameter1.469 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
material_document_and_classificationQQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE
NSN5340-01-302-5069
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 71997-7 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
•
FLANGE DIAMETER: 2.375 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.250 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 1.469 INCHES NOMINAL IN
•
STYLE DESIGNATOR: IRREGULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE
•
BODY INSIDE DIAMETER: 0.625 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER2.375 INCHES NOMINAL IN
OVERALL HEIGHT0.750 INCHES NOMINAL IN
FLANGE THICKNESS0.250 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER1.469 INCHES NOMINAL IN
STYLE DESIGNATORIRREGULAR
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE
BODY INSIDE DIAMETER0.625 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
SPECIAL FEATURESSEMICIRCULAR HOLE IN FLANGE END 0.313 IN. RADIUS IN
MATERIALCOPPER ALLOY
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
Ready to buy 71997-7?
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 71997-7?
71997-7 is a RETAINER,HELICAL COMPRESSION SPR.
What is the NSN for 71997-7?
71997-7 is cataloged in the U.S. Government catalog under NSN 5340-01-302-5069. 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 — 71997-7

✓ 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.