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281727 — INSERT,TUBE FITTING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

281727: INSERT,TUBE FITTING.

The INSERT,TUBE FITTING is a the manufacturer industrial component. Key specifications include end_item_identification: INSTRUMENT LANDING GEAR (ILS), part_name_assigned_by_controlling_agency: INSERT, TUBE FRONT. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-275-5627, 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
281727
NSN: 5310-00-275-5627
NIINs: 002755627, 016516319
FSC: 5310 — Nuts and Washers
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
end_item_identificationINSTRUMENT LANDING GEAR (ILS)
part_name_assigned_by_controlling_agencyINSERT, TUBE FRONT
NSN5310-00-275-5627
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 281727 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH ACROSS FLATS: 1.500 INCHES NOMINAL IN
•
BEARING SURFACE FINISH: 100.0 MICROINCHES
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THREAD SERIES: UNF
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HOLE CONFIGURATION STYLE: CONFIGURATION B
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MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6050,COND C4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
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NOMINAL THREAD SIZE: 1.250 INCHES IN
•
NUT HEIGHT: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.500 INCHES NOMINAL IN
BEARING SURFACE FINISH100.0 MICROINCHES
THREAD SERIESUNF
HOLE CONFIGURATION STYLECONFIGURATION B
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6050,COND C4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.250 INCHES IN
NUT HEIGHT0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
DRILLED HOLE DIAMETER0.068 INCHES NOMINAL IN
COUNTERSINK ANGLE108.0 DEGREES MINIMUM AND 112.0 DEGREES MAXIMUM NUT
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 281727?
281727 is a INSERT,TUBE FITTING.
What is the NSN for 281727?
281727 is cataloged in the U.S. Government catalog under NSN 5310-00-275-5627. 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.