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634-8177-012 — STANDOFF,THREADED,SPACING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

634-8177-012: STANDOFF,THREADED,SPACING.

The STANDOFF,THREADED,SPACING is a the manufacturer industrial component. Key specifications include length: 1.000 INCHES NOMINAL IN, width_across_flats: 0.237 INCHES MINIMUM AND 0.263 INCHES MAXIMUM IN, cross-sectional_shape: RECTANGULAR, left_counterbore_depth: 0.150 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-127-8871, 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
634-8177-012
NSN: 5340-01-127-8871
FSC: 5340 — Hardware, Commercial
CAGE: 13499 — ROCKWELL COLLINS, INC. DBA COLLINS AEROSPACE GOVERNMENT SYSTEMS DIV COLLINS AEROSPACE - GOVERNMENT SYSTEMS (USA)
SPECIFICATIONS
length1.000 INCHES NOMINAL IN
width_across_flats0.237 INCHES MINIMUM AND 0.263 INCHES MAXIMUM IN
cross-sectional_shapeRECTANGULAR
left_counterbore_depth0.150 INCHES NOMINAL IN
NSN5340-01-127-8871
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 634-8177-012 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
•
LEFT COUNTERBORE DEPTH: 0.150 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.237 INCHES MINIMUM AND 0.263 INCHES MAXIMUM IN
•
LENGTH: 1.000 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE: RECTANGULAR
TECHNICAL CHARACTERISTICS
LEFT COUNTERBORE DEPTH0.150 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.237 INCHES MINIMUM AND 0.263 INCHES MAXIMUM IN
LENGTH1.000 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPERECTANGULAR
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
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 634-8177-012?
634-8177-012 is a STANDOFF,THREADED,SPACING.
What is the NSN for 634-8177-012?
634-8177-012 is cataloged in the U.S. Government catalog under NSN 5340-01-127-8871. 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.