BACB30LR4-21

Bolt

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Description:

Fastener Length: 1-3/4", Thread: 1/4-28, Thread Length: 7/16"

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BACB30LR4-21 Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.400 inches minimum and 0.450 inches maximum
Fastener Length:
1.722 inches minimum and 1.752 inches maximum
Head Style:
Flat countersunk
Head Diameter:
0.455 inches minimum and 0.510 inches maximum
Grip Diameter:
0.2485 inches minimum and 0.2495 inches maximum
Internal Drive Style:
Cross recess type 1
Thread Diameter:
0.250 inches
Grip Length:
1.302 inches minimum and 1.322 inches maximum
Thready Qty Per Inch (tpi):
28
Countersink Angle:
99.0 degrees minimum and 101.0 degrees maximum
Material:
Iron alloy 660 overall
Material Specification:
Ams 5737 assn std single material response overall
Surface Treatment:
Cadmium overall and chromate overall
Surface Treatment Specification:
Qq-p-416 ty 2 cl 3 fed spec single treatment response overall
Thread Series Designator:
Unjf
Quick Specs
Thread Size 1/4
Thread Qty 28
Material Iron
Length 1-3/4

Additional Information

SKU / Model: BACB30LR421
NSN: 5305-01-090-6337
FSC: Screws / 5305
Product Series: BACB30LR4
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 5 EA
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
BACB30LR4-21_Military-Fasteners-com.pdf
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More BACB30LR4 machine bolts

BACB30LR4U4

Fastener Length: 47/64", Thread: 1/4-28, Thread Length: 31/64"

BACB30LR4U22

Fastener Length: 1-13/16", Thread: 1/4-28, Thread Length: 7/16"

BACB30LR4U21

Fastener Length: 1-3/4", Thread: 1/4-28, Thread Length: 7/16"

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I placed this order late at 4:15 over the phone, 15 minutes past the cut off time.(Which rarely happens) It was critical for us to get the sparkplugs as a customer had called me and scheduled to bring his plane in the next day to have all his plugs replaced. My sales agent said she would personally go and pull the product so it would ship that day, and she did what she said. She saved me the embarrassment of telling my customer I forgot to order his parts on time and making him reschedule a maintenance visit. I am thankful you have people like her who really care about the customer and want to put in the extra effort for customer service. In my aircraft maintenance business I purchase everything I can first from Military Fasteners before I go looking for other venders. I use Military Fasteners because of the great customer service, free shipping (which is one day ground), large selection on hardware and materials, and competitive prices. I am a loyal customer and I order 2-3+ times a week. Thank you for the great service that your people provide at Military Fasteners.

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