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D221 — DISTRIBUTION BOX

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

D221: DISTRIBUTION BOX.

The DISTRIBUTION BOX is a the manufacturer industrial component. Key specifications include material: WOOD, special_features: 1 DRILLED HOLE; CONTROL LINE INSERTION, end_item_identification: MISCELLANEOUS PARTS; FSCM 02989. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-989-3412, 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
D221
NSN: 5310-00-989-3412
NIINs: 009893412, 013248607, 014310728
FSC: 5310 — Nuts and Washers
CAGE: 35381 — M K T MANUFACTURING INC (USA)
SPECIFICATIONS
materialWOOD
special_features1 DRILLED HOLE; CONTROL LINE INSERTION
end_item_identificationMISCELLANEOUS PARTS; FSCM 02989
general_characteristics_item_descriptionSTEEL,1.250 IN. H,1.938 IN. OD,0.688 IN. ID,INTERNALLY THREADED,0.688-16 UN RH THD,0.250 IN. DIA HOLE DRILLED THRU BODY LOCATED 0.312 IN. FROM END IN
NSN5310-00-989-3412
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: D221 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: STEEL,1.250 IN. H,1.938 IN. OD,0.688 IN. ID,INTERNALLY THREADED,0.688-16 UN RH THD,0.250 IN. DIA HOLE DRILLED THRU BODY LOCATED 0.312 IN. FROM END IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSTEEL,1.250 IN. H,1.938 IN. OD,0.688 IN. ID,INTERNALLY THREADED,0.688-16 UN RH THD,0.250 IN. DIA HOLE DRILLED THRU BODY LOCATED 0.312 IN. FROM END IN
SUBSTITUTES & CROSS-REFERENCES 1
0201600Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is D221?
D221 is a DISTRIBUTION BOX.
What parts can replace D221?
There is 1 known substitute for D221: 0201600. Substitute compatibility should be verified for your specific system.
What is the NSN for D221?
D221 is cataloged in the U.S. Government catalog under NSN 5310-00-989-3412. This indicates validated use in U.S. government and defense supply chains.
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