Mfr Part #:

NAS662C2R4

Mfr Name: QPL

The NAS662C2R4 is a machine screw from QPL, featuring a 1/4" length and a 2-56 thread size. It is constructed from corrosion-resistant steel with a passivated surface treatment.

✓ Total Stock: 70 pcs

$ Price Range: $0.99

NAS662C2R4 Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Speed Components Ltd ✓ Non-Authorised Inventory information	70 pcs On Request	70 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

NAS662C2R4 Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	QPL
Failure Rate	NAS662
Head Diameter	0.156-0.172 in
Head Style	Flat countersunk
Length	0.219-0.250 in
Thread Length	0.214-0.250 in
Thread Size	2-56

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NAS662C2R4 Description

Short technical summary and product information.

The NAS662C2R4 is a machine screw manufactured by QPL, designed for various fastening applications. This screw features a 1/4" length and a 2-56 thread size with a coarse thread series (UNC) and a class 2A thread fit. The head style is flat countersunk with a Phillips cross recess drive.

Constructed from corrosion-resistant steel (comp 302 or 303) and treated with a passivate surface finish, the NAS662C2R4 meets ASTM A582 or MIL-S-7720 specifications. It offers a minimum tensile strength of 80,000 psi. The countersink angle is between 99.0 and 101.0 degrees.

This screw is suitable for applications requiring reliable and durable fastening. Its material and surface treatment provide resistance to corrosion. The standard package quantity is 100 pieces.

NAS662C2R4 Quick Information

Product Type: Machine Screw

Series: NAS662

Canonical Name: NAS662C2R4 Machine Screw

Subcategory: Screws

NAS662C2R4 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

NAS662C2R4 Estimated Pricing

Qty	Low	High
1+	$0.99	$0.99

Estimated market price range - modelled values for guidance only, not live distributor offers.

NAS662C2R4 Features

1/4 inch length, 2-56 thread size.
Flat countersunk head with Phillips drive.
Corrosion-resistant steel construction.
Passivated surface treatment.
Minimum tensile strength of 80,000 psi.

NAS662C2R4 Applications

Used in military aerospace assemblies.
Ideal for flush-mount panel fastening.
Suitable for corrosion-resistant electronic enclosures.
Common in high-strength threaded joints.
Applied in NAS662 series hardware installations.

NAS662C2R4 FAQs

7 frequently asked questions generated from this part’s specifications.

What thread size does the NAS662C2R4 screw have?

The NAS662C2R4 has a #2-56 UNC thread with class 2A fit and right-hand direction.

What is the length of the NAS662C2R4?

The nominal length is 1/4 inch (0.250 inches), with an overall fastener length range of 0.219 to 0.250 inches.

What head style and drive does this screw have?

It has a flat countersunk head and a Phillips cross recess type 1 (cruciform) drive.

What material is the NAS662C2R4 made from?

It is made from steel composition 302 or 303, passivated per QQ-P-35, and complies with ASTM A582 or MIL-S-7720.

What is the tensile strength of this screw?

The minimum tensile strength is 80,000 psi.

What are the countersink and head dimensions?

The countersink angle ranges from 99 to 101 degrees, and the head diameter ranges from 0.156 to 0.172 inches.

How many pieces are in a standard package?

The standard package quantity is 100 pieces, with a pack weight of 0.040 lb.