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81-157 — TRANSFORMER,POWER

✓ Government record, cited
Jumbo · BOLT SCREW
PRODUCT OVERVIEW

81-157: TRANSFORMER,POWER.

The TRANSFORMER,POWER is a Jumbo industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, groove_width: 0.172 INCHES MINIMUM AND 0.204 INCHES MAXIMUM IN, grommet_style: ROUND, hole_diameter: 0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN, overall_height: 0.281 INCHES MINIMUM AND 0.343 INCHES MAXIMUM IN, flange_thickness: 0.046 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-202-4004, 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
81-157
NSN: 5325-00-202-4004
NIINs: 002024004, 013958682
FSC: 5325 — Fastening Devices
CAGE: 23386 — THALES DEFENSE & SECURITY INC DBA THALES COMMUNICATIONS INC (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
groove_width0.172 INCHES MINIMUM AND 0.204 INCHES MAXIMUM IN
grommet_styleROUND
hole_diameter0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN
overall_height0.281 INCHES MINIMUM AND 0.343 INCHES MAXIMUM IN
flange_thickness0.046 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN
features_providedCOOLANT RESISTANT AND OIL RESISTANT
groove_outside_diameter0.422 INCHES MINIMUM AND 0.454 INCHES MAXIMUM IN
grommet_construction_typeSOLID
large_flange_outside_diameter0.594 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN
material_document_and_classificationSTM D2000 BG515A14B24C32E036F19Z ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5325-00-202-4004
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 81-157 · Jumbo ⚠ 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
•
GROMMET STYLE: ROUND
•
FLANGE THICKNESS: 0.046 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: STM D2000 BG515A14B24C32E036F19Z ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
FEATURES PROVIDED: COOLANT RESISTANT AND OIL RESISTANT
•
LARGE FLANGE OUTSIDE DIAMETER: 0.594 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN
•
COLOR: BLACK OVERALL
•
GROOVE OUTSIDE DIAMETER: 0.422 INCHES MINIMUM AND 0.454 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.281 INCHES MINIMUM AND 0.343 INCHES MAXIMUM IN
GROMMET STYLEROUND
FLANGE THICKNESS0.046 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONSTM D2000 BG515A14B24C32E036F19Z ASSN STD SINGLE MATERIAL RESPONSE OVERALL
FEATURES PROVIDEDCOOLANT RESISTANT AND OIL RESISTANT
LARGE FLANGE OUTSIDE DIAMETER0.594 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN
COLORBLACK OVERALL
GROOVE OUTSIDE DIAMETER0.422 INCHES MINIMUM AND 0.454 INCHES MAXIMUM IN
GROMMET CONSTRUCTION TYPESOLID
MATERIALRUBBER SYNTHETIC OVERALL
SUBSTITUTES & CROSS-REFERENCES 8
12Z12002-55Reference document
Same NSN cross-reference
Reference document — Secondary reference
2754Reference document
Same NSN cross-reference
Reference document — Secondary reference
SP-1777Reference document
Same NSN cross-reference
Reference document — Secondary reference
7716676P26Reference document
Same NSN cross-reference
Reference document — Secondary reference
8531038Reference document
Same NSN cross-reference
Reference document — Secondary reference
00044M-02Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 81-157?
81-157 is a TRANSFORMER,POWER manufactured by Jumbo.
What parts can replace 81-157?
There are 8 known substitutes for 81-157: 12Z12002-55, 2754, SP-1777 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 81-157?
81-157 is cataloged in the U.S. Government catalog under NSN 5325-00-202-4004. This indicates validated use in U.S. government and defense supply chains.
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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.