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122039 — NUT,TUBE COUPLING,REDUCING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

122039: NUT,TUBE COUPLING,REDUCING.

The NUT,TUBE COUPLING,REDUCING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, end_item_identification: GPC1-10000-AF, GAS PRESSURE CONTROLLER, NSN-6685-01-529-6990., part_name_assigned_by_controlling_agency: VALVE NUT. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-012-2039, 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
122039
NSN: 5310-00-012-2039
NIINs: 000122039, 015620138
FSC: 5310 — Nuts and Washers
CAGE: 21450 — ARMY WEAPONS COMMAND ATTN AMSWE-REE-S (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
end_item_identificationGPC1-10000-AF, GAS PRESSURE CONTROLLER, NSN-6685-01-529-6990.
part_name_assigned_by_controlling_agencyVALVE NUT
NSN5310-00-012-2039
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 122039 · 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: 1.0880 INCHES MINIMUM AND 1.1250 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
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NOMINAL THREAD SIZE: 0.750 INCHES IN
•
NONDEFINITIVE SPEC/STD DATA: A TYPE
•
NUT HEIGHT: 0.617 INCHES MINIMUM AND 0.665 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.0880 INCHES MINIMUM AND 1.1250 INCHES MAXIMUM IN
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.750 INCHES IN
NONDEFINITIVE SPEC/STD DATAA TYPE
NUT HEIGHT0.617 INCHES MINIMUM AND 0.665 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
NUT STYLEHEXAGON
THREAD CLASS3B
THREAD QUANTITY PER INCH16
SUBSTITUTES & CROSS-REFERENCES 1
FFB571TYPEAReference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 122039?
122039 is a NUT,TUBE COUPLING,REDUCING.
What parts can replace 122039?
There is 1 known substitute for 122039: FFB571TYPEA. Substitute compatibility should be verified for your specific system.
What is the NSN for 122039?
122039 is cataloged in the U.S. Government catalog under NSN 5310-00-012-2039. 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.