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28290 — RETAINER,REGULATOR PISTON

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

28290: RETAINER,REGULATOR PISTON.

The RETAINER,REGULATOR PISTON is a the manufacturer industrial component. Key specifications include special_features: NUT, HEX 3/4 IN -10, A563, HEAVY DUTY 3/4 -10 GR HV HDG HEX NUT HDG/GREEN LUBE IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-464-7305, 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
28290
NSN: 5325-00-464-7305
NIINs: 004647305, 010504055, 011355624, 016977334
FSC: 5325 — Fastening Devices
CAGE: 95201 — NAPCO INTERNATIONAL LLC DBA NAPCO INTERNATIONAL INC (USA)
SPECIFICATIONS
special_featuresNUT, HEX 3/4 IN -10, A563, HEAVY DUTY 3/4 -10 GR HV HDG HEX NUT HDG/GREEN LUBE IN
NSN5325-00-464-7305
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 28290 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
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MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
MATERIALSTEEL OVERALL
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
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FREQUENTLY ASKED QUESTIONS
What is 28290?
28290 is a RETAINER,REGULATOR PISTON.
What is the NSN for 28290?
28290 is cataloged in the U.S. Government catalog under NSN 5325-00-464-7305. This indicates validated use in U.S. government and defense supply chains.
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✓ 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.